1. Introduction to HTML and CSS

Overview

By the end of this chapter, you will be able to describe the roles of HTML and CSS in a web page; explain the HTML DOM and CSSOM; explain how a web page renders; create a web page from scratch; and use CSS selectors and calculate CSS specificity.

This chapter introduces two core technologies of the web – HTML and CSS. We will look at how they work, how we can write them, and how we can use them to build web pages.